It means he wanted to have anal sex with her. Also, it’s a veiled reference to turning a girl into a prostitute, as in to turn her over to the next guy.
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Name : Guido B., Gender : M, Sexual Orientation : Straight, Race : White/Caucasian, Religion : Humanist, Age : 43, City : London, State : NA, Country : United Kingdom, Education level : Over 4 Years of College, Social class : Upper class,